Notes for checkpw - reproducible builds result

Version annotated: 1.02-1
Identified issues:
Identifier: timestamps_in_gzip_headers
Description gzip stores a timestamp by default in its header.
Bugs noted: 777299+: "checkpw: please make the build reproducible"

Our notes about issues affecting packages are stored in notes.git and are targeted at packages in Debian in 'unstable/amd64' (unless they say otherwise).